1 P

H

2 W

O

R

K

F

U

N

C

T

I

O

N

T

3 M

4 A

B

S

O

R

P

T

I

O

N

S

P

5 E

C

T

R

6 U

M

A

E

M

N

X

7 B

8 Q

9 R

L

I

C

10 Q

L

U

E

E

S

E

U

P

A

11 E

A

S

C

S

R

A

12 E

L

E

C

T

R

O

N

V

O

L

T

I

T

N

A

K

N

T

N

R

O

A

T

N

B

E

A

A

I

N

I

U

C

O

S

T

C

13 N

N

M

K

D

T

O

I

S

T

Y

R

E

E

P

Y

M

R

S

F

L

E

E

U

F

S

C

P

C

14 U

L

T

R

A

V

I

O

L

E

T

C

A

T

A

S

T

R

O

P

H

E

H

C

B

R

I

A

15 F

R

E

Q

U

E

N

C

Y

T

O

U

N

N

R

H

M

C

I

F

R

I

C

16 C

O

M

P

T

O

N

S

H

I

F

T

P

S

R

L

17 L

O

U

I

S

D

E

B

R

O

G

L

I

E

E

Across 2. Smallest amount of energy the electron must have to escape the surface of metal. 4. Spectral lines corresponding to this process. 12. The energy that and electron or a photon gains. 14. Explains why amount of energy being radiated approaches zero. 15. Energy of a quantum = Planck's constant x __________. 16. Provides support for Einstein's photon theory of light. 17. Extended the wave-particle duality.

Down 1. Emission of electrons when light strikes a metal. 3. This physicist developed a formula for blackbody radiation. 5. Series of spectral lines. 6. Created by Werner Heisenberg. 7. Radiation observed by a hollow object with a small object. 8. The units of light energy aka photons. 9. Submicroscopic electric oscillators. 10. Theory marked by energy coming in discrete units. 11. Performed an experiment to disprove Thomson's model. 13. Proposed a model of the hydrogen atom that explains atomic spectra.